97206d5727
This renames the LLDB error class to Status, as discussed on the lldb-dev mailing list. A change of this magnitude cannot easily be done without find and replace, but that has potential to catch unwanted occurrences of common strings such as "Error". Every effort was made to find all the obvious things such as the word "Error" appearing in a string, etc, but it's possible there are still some lingering occurences left around. Hopefully nothing too serious. llvm-svn: 302872
125 lines
4.3 KiB
C++
125 lines
4.3 KiB
C++
//===-- AppleGetPendingItemsHandler.h ----------------------------*- C++
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//-*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#ifndef lldb_AppleGetPendingItemsHandler_h_
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#define lldb_AppleGetPendingItemsHandler_h_
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// C Includes
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// C++ Includes
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#include <map>
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#include <mutex>
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#include <vector>
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// Other libraries and framework includes
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// Project includes
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#include "lldb/Symbol/CompilerType.h"
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#include "lldb/Utility/Status.h"
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#include "lldb/lldb-public.h"
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// This class will insert a UtilityFunction into the inferior process for
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// calling libBacktraceRecording's
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// __introspection_dispatch_queue_get_pending_items()
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// function. The function in the inferior will return a struct by value
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// with these members:
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//
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// struct get_pending_items_return_values
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// {
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// introspection_dispatch_item_info_ref *items_buffer;
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// uint64_t items_buffer_size;
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// uint64_t count;
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// };
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//
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// The items_buffer pointer is an address in the inferior program's address
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// space (items_buffer_size in size) which must be mach_vm_deallocate'd by
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// lldb. count is the number of items that were stored in the buffer.
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//
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// The AppleGetPendingItemsHandler object should persist so that the
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// UtilityFunction
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// can be reused multiple times.
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namespace lldb_private {
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class AppleGetPendingItemsHandler {
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public:
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AppleGetPendingItemsHandler(lldb_private::Process *process);
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~AppleGetPendingItemsHandler();
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struct GetPendingItemsReturnInfo {
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lldb::addr_t items_buffer_ptr; /* the address of the pending items buffer
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from libBacktraceRecording */
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lldb::addr_t
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items_buffer_size; /* the size of the pending items buffer from
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libBacktraceRecording */
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uint64_t count; /* the number of pending items included in the buffer */
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GetPendingItemsReturnInfo()
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: items_buffer_ptr(LLDB_INVALID_ADDRESS), items_buffer_size(0),
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count(0) {}
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};
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//----------------------------------------------------------
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/// Get the list of pending items for a given queue via a call to
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/// __introspection_dispatch_queue_get_pending_items. If there's a page of
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/// memory that needs to be freed, pass in the address and size and it will
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/// be freed before getting the list of queues.
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///
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/// @param [in] thread
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/// The thread to run this plan on.
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///
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/// @param [in] queue
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/// The dispatch_queue_t value for the queue of interest.
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///
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/// @param [in] page_to_free
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/// An address of an inferior process vm page that needs to be
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/// deallocated,
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/// LLDB_INVALID_ADDRESS if this is not needed.
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///
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/// @param [in] page_to_free_size
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/// The size of the vm page that needs to be deallocated if an address was
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/// passed in to page_to_free.
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///
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/// @param [out] error
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/// This object will be updated with the error status / error string from
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/// any failures encountered.
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///
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/// @returns
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/// The result of the inferior function call execution. If there was a
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/// failure of any kind while getting
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/// the information, the items_buffer_ptr value will be
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/// LLDB_INVALID_ADDRESS.
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//----------------------------------------------------------
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GetPendingItemsReturnInfo GetPendingItems(Thread &thread, lldb::addr_t queue,
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lldb::addr_t page_to_free,
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uint64_t page_to_free_size,
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lldb_private::Status &error);
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void Detach();
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private:
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lldb::addr_t
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SetupGetPendingItemsFunction(Thread &thread,
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ValueList &get_pending_items_arglist);
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static const char *g_get_pending_items_function_name;
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static const char *g_get_pending_items_function_code;
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lldb_private::Process *m_process;
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std::unique_ptr<UtilityFunction> m_get_pending_items_impl_code;
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std::mutex m_get_pending_items_function_mutex;
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lldb::addr_t m_get_pending_items_return_buffer_addr;
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std::mutex m_get_pending_items_retbuffer_mutex;
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};
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} // using namespace lldb_private
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#endif // lldb_AppleGetPendingItemsHandler_h_
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